57. (2018苏州)—Oh, dear! A power cut!
—Sorry, I didn't know you ________ the washing machine.
A. are using B. used C. use D. were using
57. D【解析】考查过去进行时。句意“噢,乖乖!停电了!”“抱歉,我不知道你刚才正在用洗衣机。”根据“I didn't know”可知用一般过去时,宾语从句的时态也应该是过去时,表示停电的时候对方正在使用洗衣机,即过去进行时。故选D。
—Sorry, I didn't know you ________ the washing machine.
A. are using B. used C. use D. were using
57. D【解析】考查过去进行时。句意“噢,乖乖!停电了!”“抱歉,我不知道你刚才正在用洗衣机。”根据“I didn't know”可知用一般过去时,宾语从句的时态也应该是过去时,表示停电的时候对方正在使用洗衣机,即过去进行时。故选D。